Abstract
Three BIOZZI-HR mice were immunized with human growth hormone (hGH). From the determination of the titer, the average equilibrium association constant and the heterogeneity index of the antisera, it was possible to select the most suitable mouse for production of monoclonal antibodies (Mabs). Resulting from a single fusion, eight Mabs were produced, purified and characterized. The equilibrium association constant of the Mabs ranged from 5.10(8) M-1 to 9.109 M-1 at physiological pH. Four areas on hGH are recognized by the Mabs (the topology of the Mabs was investigated by two-site immunoradiometric assays). The Mabs, which recognize a same area, show similar cross-reactivities between hGH and human Placental Lactogen (hPL). No selected Mabs bound human Prolactin (hPRL), equine Growth Hormone (eGH) and porcine Growth Hormone (pGH). Two complementary Mabs enable a two-site immunometric assay of pituitary and E. Coli derived hGH.
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